Question

A teacher surveyed her class about their online accounts

Answer 1

`(1)/(2)`

Explanation:

Thinking process:

Let the total set be the combination of all the sets as shown

It means that total items = 7 + 14 + 7 + 2

= 30

But the total number of the subsets = 5 + 7+ 2

= 14

Therefore the probability =
`(snap chat)/(total )`

=
`(7)/(14)`

=
`(1)/(2)`